These are usernames for Instagram.
David: amazingperson34
Max: stfuidiot7
Nikki:onewiththewild
Neil: scientist568
Ered: 2c00l4u
Nerris: betteratmagic5
Harrison: nobrother7
Gwen: fanficwriter55
Daniel: yourl0calcultleader
Jen: icecreamisbae666
Dolph: candyisc00l
Space kid: spacejam66
Quatermaster and Campbell won't have Instagram, along with Snake and Edward
Preston: preformer8000